Method and system for fixing carbon dioxide

Abstract

A method for fixing carbon dioxide according to the present disclosure includes: capturing carbon dioxide from seawater at a direct ocean capture (DOC) facility; concentrating a mineral source in seawater at the DOC facility; supplying the captured carbon dioxide to the mineral source; supplying carbon dioxide obtained outside the DOC facility to the mineral source; and mixing the carbon dioxide captured at the DOC facility and the carbon dioxide supplied from outside the DOC facility with the mineral source to carbonate the mineral source.

What is claimed is: 
     
         1 . A method for fixing carbon dioxide, the method comprising:
 capturing carbon dioxide from seawater at a direct ocean capture facility;   concentrating a mineral source in seawater at the direct ocean capture facility;   supplying the captured carbon dioxide to the mineral source;   supplying carbon dioxide obtained outside the direct ocean capture facility to the mineral source; and   mixing the carbon dioxide captured at the direct ocean capture facility and the carbon dioxide supplied from outside the direct ocean capture facility with the mineral source to carbonate the mineral source.   
     
     
         2 . The method according to  claim 1 , wherein the carbon dioxide obtained from outside the direct ocean capture facility is supplied to the mineral source as a gas having a higher carbon dioxide concentration than an atmospheric carbon dioxide concentration. 
     
     
         3 . The method according to  claim 1 , wherein the carbon dioxide obtained from outside the direct ocean capture facility is carbon dioxide gas contained in exhaust gas from a plant or a factory. 
     
     
         4 . The method according to  claim 1 , wherein the carbon dioxide obtained from outside the direct ocean capture facility is supplied from a direct air capture facility. 
     
     
         5 . A system for fixing carbon dioxide, the system comprising:
 a capture unit that captures carbon dioxide from seawater at a direct ocean capture facility;   a seawater concentration unit that concentrates a mineral source in seawater at the direct ocean capture facility;   a supply unit that supplies carbon dioxide obtained outside the direct ocean capture facility to the mineral source; and   a fixation unit that mixes the carbon dioxide supplied from the supply unit with the mineral source to carbonate the mineral source.